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/Documentation/devicetree/bindings/iio/adc/
Davia-hx711.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/iio/adc/avia-hx711.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Andreas Klinger <ak@it-klinger.de>
13 Bit-banging driver using two GPIOs:
14 - sck-gpio gives a clock to the sensor with 24 cycles for data retrieval
17 - dout-gpio is the sensor data the sensor responds to the clock
25 - avia,hx711
27 sck-gpios:
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/Documentation/devicetree/bindings/iio/proximity/
Dparallax-ping.yaml1 # SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/iio/proximity/parallax-ping.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Andreas Klinger <ak@it-klinger.de>
13 Bit-banging driver using one GPIO:
14 - ping-gpios is raised by the driver to start measurement
15 - direction of ping-gpio is then switched into input with an interrupt
19 http://parallax.com/sites/default/files/downloads/28041-LaserPING-2m-Rangefinder-Guide.pdf
20 http://parallax.com/sites/default/files/downloads/28015-PING-Documentation-v1.6.pdf
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Ddevantech-srf04.yaml1 # SPDX-License-Identifier: GPL-2.0
3 ---
4 $id: http://devicetree.org/schemas/iio/proximity/devantech-srf04.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Andreas Klinger <ak@it-klinger.de>
13 Bit-banging driver using two GPIOs:
14 - trigger-gpio is raised by the driver to start sending out an ultrasonic
16 - echo-gpio is held high by the sensor after sending ultrasonic burst
20 https://www.robot-electronics.co.uk/htm/srf04tech.htm
22 https://www.maxbotix.com/documents/LV-MaxSonar-EZ_Datasheet.pdf
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/Documentation/misc-devices/
Dc2port.rst1 .. SPDX-License-Identifier: GPL-2.0
23 --------
26 C2 Interface used for in-system programming of micro controllers.
28 By using this driver you can reprogram the in-system flash without EC2
33 ----------
38 - AN127: FLASH Programming via the C2 Interface at
41 - C2 Specification at
44 however it implements a two wire serial communication protocol (bit
45 banging) designed to enable in-system programming, debugging, and
46 boundary-scan testing on low pin-count Silicon Labs devices. Currently
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/Documentation/driver-api/gpio/
Dintro.rst17 A "General Purpose Input/Output" (GPIO) is a flexible software-controlled
20 represents a bit connected to a particular pin, or "ball" on Ball Grid Array
25 System-on-Chip (SOC) processors heavily rely on GPIOs. In some cases, every
26 non-dedicated pin can be configured as a GPIO; and most chips have at least
31 Most PC southbridges have a few dozen GPIO-capable pins (with only the BIOS
36 - Output values are writable (high=1, low=0). Some chips also have
38 value might be driven, supporting "wire-OR" and similar schemes for the
41 - Input values are likewise readable (1, 0). Some chips support readback
42 of pins configured as "output", which is very useful in such "wire-OR"
44 input de-glitch/debounce logic, sometimes with software controls.
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Ddrivers-on-gpio.rst6 the right in-kernel and userspace APIs/ABIs for the job, and that these
10 - leds-gpio: drivers/leds/leds-gpio.c will handle LEDs connected to GPIO
13 - ledtrig-gpio: drivers/leds/trigger/ledtrig-gpio.c will provide a LED trigger,
15 (and that LED may in turn use the leds-gpio as per above).
17 - gpio-keys: drivers/input/keyboard/gpio_keys.c is used when your GPIO line
20 - gpio-keys-polled: drivers/input/keyboard/gpio_keys_polled.c is used when your
24 - gpio_mouse: drivers/input/mouse/gpio_mouse.c is used to provide a mouse with
29 - gpio-beeper: drivers/input/misc/gpio-beeper.c is used to provide a beep from
31 off/on, for an actual PWM waveform, see pwm-gpio below.)
33 - pwm-gpio: drivers/pwm/pwm-gpio.c is used to toggle a GPIO with a high
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/Documentation/PCI/
Dpci.rst1 .. SPDX-License-Identifier: GPL-2.0
7 :Authors: - Martin Mares <mj@ucw.cz>
8 - Grant Grundler <grundler@parisc-linux.org>
11 Since each CPU architecture implements different chip-sets and PCI devices
18 by Jonathan Corbet, Alessandro Rubini, and Greg Kroah-Hartman.
22 However, keep in mind that all documents are subject to "bit rot".
26 "Linux PCI" <linux-pci@atrey.karlin.mff.cuni.cz> mailing list.
38 supporting hot-pluggable PCI, CardBus, and Express-Card in a single driver].
45 - Enable the device
46 - Request MMIO/IOP resources
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Dpci-error-recovery.rst1 .. SPDX-License-Identifier: GPL-2.0
8 :Authors: - Linas Vepstas <linasvepstas@gmail.com>
9 - Richard Lary <rlary@us.ibm.com>
10 - Mike Mason <mmlnx@us.ibm.com>
16 chipsets are able to deal with these errors; these include PCI-E chipsets,
17 and the PCI-host bridges found on IBM Power4, Power5 and Power6-based
32 including multiple instances of a device driver on multi-function
34 waiting for some i/o-space register to change, when it never will.
39 is forced by the need to handle multi-function devices, that is,
42 of reset it desires, the choices being a simple re-enabling of I/O
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/Documentation/ABI/stable/
Dsysfs-driver-mlxreg-io1 What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/asic_health
6 0 - health failed, 2 - health OK, 3 - ASIC in booting state.
10 What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/cpld1_version
11 What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/cpld2_version
20 What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/fan_dir
25 forward direction - relevant bit is set 0;
26 reversed direction - relevant bit is set 1.
30 What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/cpld3_version
39 What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/jtag_enable
48 What: /sys/devices/platform/mlxplat/mlxreg-io/hwmon/hwmon*/select_iio
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